Grammatical name [closed]

What is the grammatical name and function of "The variety of vitamins and nutrients in green beans" help prevent many health problems

Solution 1:

In English grammar there are two main parts of a sentence: the subject and the predicate.

The subject usually appears before the predicate to show what the sentence is about, or who or what performs the action.

The subject of a sentence may be one word or several words. Commonly it is a noun, a pronoun, or a noun phrase. Sometimes it can be even an entire clause:

What he had already forgotten about computer repair could fill whole volumes.

In your example:

The variety of vitamins and nutrients in green beans helps prevent many health problems.

the part in bold is a noun phrase that functions as the subject of the sentence.

Source: http://guidetogrammar.org/grammar/subjects.htm